Mold.



No. 805,418. PATENTED NOV. 21, 1905.

R. T. FROST.

MOLD.

APPLIGATION IILE) 1113.15. 1905.

2 SHEETS-SHEET?.

ROBERT T. FROST, OF DOWS, IOWA.

MOLD.

No. 805,418.v

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed February 15, 1905. Serial No. 245,725.

To @ZZ wlwwb t rma/y concern.-

Be it known that l, ROBERT T. FROST, a citizen of the United States, residing at Dows, in the county of Wright and State of Iowa, have invented certain new and useful lmprovements in Molds, of which the following is a specification.

This invention relates to improvements in molds for making building blocks or tiles out of plastic material; and the invention resides, essentially, in the novel construction of the mold-box, whereby the same may be readily knocked down in removing the molded article therefrom, in peculiar means for holding the parts of the mold-box in proper assembled positions, and in the special construction of core or cores designed for use in connection with the mold for constructing hollow blocks. l

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the results reference is to be had to the following description and accompanying drawings.

While the invention may be adapted to different forms and conditions by changes in the structure and minor details without departing from the spirit or essential features thereof, still the referred embodiment thereof is shown in t e accompanying drawings, in which- Figure l is a perspective view of a mold embodying the essential features of the invention. Fig. 2 is a vertical longitudinal sectional view of the invention, the cores be* ing shown in operative position and the pallet-plate in place. Fig. 3 is a transverse vertical sectional view. Fig. 4 is a bottom plan view. Fig. 5 is a perspective view of the bottom board used for the mold.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to the drawings, the mold-box l consists of the usual sides 2 and ends 3. The sides 2 of the boX 1 are rabbeted at the end portions, as shown at 4, to receive the end portions of the ends 3 and afford a close and compact arrangement of the parts. The sides and ends of the boX 1 are supported upon a suitable base 5, which consists of a plate or frame having a central longitudinal opening 6. Arms 7 project from the base 5 at the ends and sides thereof, two arms being projected, preferably, from each side and a single arm at each end. The arms 7 may be integral with the base 5 and are slotted longitudinally, as shown at 8, to receive fastening members 9 of adjustable standards 10, which are carried by the base, one standard being provided for each of the arms 7. The several standards 10 are utilized Yto hold the sides and ends of the mold-box together preparatory to use of the device in actual operation. The sides 2 and the ends 3 are formed upon the outer faces thereof with upwardly and outwardly inclined cams 11, said cams being preferably composed of integral ribs adapted to be engaged by the inner sides of the several standards 10 in order that as the members 2 and 3 are forced downwardly between the standards l() said standards will cooperate with the members 11 bya sort of wedge action and force the sides and ends hard together, holding the same in such a position in tamping the material in the mold. The inner surfaces of the standards 10, which engage the cams 11, are inclined outwardlytoward the upper extremities of the standards in order that the sides and ends of the mold-box will assume proper vertical positions when forced together in the manner above described. Outwardlyprojecting lugs 12 extend from the lower edge portions of the sides 2 and are adapted to cooperate with the standards 10 in order to centralize the sides with reference thereto, so that the parts of the mold-box will be accurately alined relative to each other when assembled. The adjustability of the standards 10 admits of increasing the size of the block according to the desires of the manufacturer, since the members 2 and 3 may be made in different sizes in an obvious manner. lt is preferred that the ends 3 be provided with core-pieces 13 uponthe inner sides thereof to form cavities in the ends of the block molded in the device. Central cores 14 of anysuitable number are also used in order to construct a block having air-spaces therethrough, and these cores 14 are preferably of hollow formation, as shown most clearly in Fig. 2 of the drawings. The cores 14 are peculiarly mounted with relation to the base 5 of the mold, being loosely connected therewith by means of fastenings 15. The fastenings 1 5 pass through openings in the base 5 and lugs 16, which project inwardly from the remote end portions of the cores 14. rl`he fastenings may be bolts or the like and are of a length sullicient to admit of a certain amount of vertical movement of the cores 14 with. reference to the base 5 in a manner clearly apparent. A spring-plate 17 is connected with the lower portion of each of the cores 14, as shown at 18, and this spring-'plate is of curved form, so that the ends thereof may rest upon the support carrying the base 5, and said spring thereby firmly holds the cores 14 in proper position within the mold-box a short distance above the base 5. The spring 17 passes through the central longitudinal opening 6 in the base 5, and the ends of this spring are spaced from the base, so as to afford convenient handles, which may be grasped by the operator in removing the core from the moldbox after the latter has been inverted. The mold-box is provided with the customary removable bottom board 19, which is shown in Fig. 5, and this bottom board is provided with openings through which the cores 14 may pass. rl`he bottom board 19 is supported upon the base 5 by adjustable members in the form of feed-screws 20, these screws being provided at the upper ends with enlargements 21 and at the lower ends with many-sided heads 22 to admit of application of a wrench or any othertool to eli'ect adjustment thereof. A jam-nut 23 is disposed between the ends of each screw to fix the adjustment of the latter in a manner apparent. rllhe bottom board 19 rests upon the enlargements 21 of the feedscrews 20, and should it be desired to mold a block of a predetermined depth adjustment of the screws 20 will admit of variation in this di-men sion of the block, as will be readily appreciated. Stud-bolts 24 have the upper ends thereof in engagement with the under side of the bottom board also and assist in positioning said bottom board. The base 5 is provided with a number of downwardly-extending lugs 25 upon its under side, said lugs preferably projecting one from each of the arms 7 and forming feet, supporting the base in spaced relation to the support upon which it is disposed.

In its operation the mold is first set up in substantially the form shown in Fig. 1, the standards l0A and the bottom board 19 having been adjusted to secure a block of the requisite size. rl`he cores 1 4 are held in the mold-box by means of the spring-plate 17, and the material may now be tamped in the box l in the customary manner. The block is now struck off and the pallet-plate 26 is placed in position. To remove the molded block from the mold-box, said box is inverted and supported upon the pallet-plate 26. The ends of the spring 17 are now grasped and the cores 14 are pulled upwardly, said cores having a certain amount of movement independent of the base 5, as described hereinbefore. rl`he cores 14 are loosened by the initial movement above, and as soon as the same come into contact with the base 5 said base is readily lifted, together with the standards and parts attached thereto, off of the sides 2 and the ends 3 of the box. The sides and ends of the mold-box may be readilyremoved and the molded article exposed.

It is of course contemplated to use the mold without the cores, as described above, and in this instance a solid bottom plate would be provided for the mold-box, and these bottom plates may be designed to form the face ofthe block and are aneled and rock-faced. ln this way the bllock can be faced with richer mixture by spreading a coarser material over the bottom before lilling the mold.

Having thus described the invention, what is claimed as new is- 1. ln a mold, the combination of a base, a mold-box uponsaid base and comprising separate sides and ends, aplurality of laterallyadjustable independent standards mounted upon the base, and cams carried by the sides to engage the standards, as specified.

2. ln a mold, the combination of a base, a plurality of independent standards extending upwardly from the base, a mold-box composed of separate sides and ends to be held togetherby the standards, the cams 1l carried by the sides and ends to engage the standards, and the lugs 12 projected from the sides for cooperation with the standards to facilitate positioning of the cams 11 with reference to said standards.

3. ln a mold, the combination of a base, a mold-box thereon comprising a plurality of sides, -a core for the mold-box having loose connection with the base aforesaid, and a iiat spring attached to said core to normally hold the same in a predetermined position relative to the base, said spring being spaced from the core in its length to form a handle.

4. In a mold, the combination of a base, a mold-box thereon comprising a plurality of sides, a core for the mold-box having loose connection with the base aforesaid, and a spring attached at a point between its ends to the core and having its ends curved outwardly from the base-to form handles.

5. ln a mold, the combination of a base having laterally-extending arms, a plurality of standards adjustably mounted upon the arms aforesaid and having the inner sides thereof inclined, a mold-box mounted upon the base and comprising a plurality of sides,

IOO

IYIO

cams upon the outer faces ofthe sides of the I ing its ends spaced from the base to form mold-box and engaging the inclined portions l handles. ro'

of the standards as specified, the base being provided With a central longitudinal opening, core-pieces for the mold-box, members latel`- ally connecting the core-pieces With the base7 and a fiat spring connected ata point between its ends With the core-pieces and hav- In testimony whereof I afiX my signature in presence of tWo Witnesses.

ROBERT T. FROST. Witnesses:

L. L. BEINHANER, J. A. WILSON. 

